"It is quite a narrow studio [1970s], I can never see a big four-panel [panels she was working on the same time as parts of one tryptich] all at once.. ..I can see two big panels. That’s about all.. .I had an awful lot going on at once, going back and forth. I turn [canvases] to a wall (when I am not working on them). I cant paint with everything showing."
January 1, 1970
https://en.wikiquote.org/wiki/Joan_Mitchell